diff --git a/ros2nix/ros2nix.py b/ros2nix/ros2nix.py
index 8bf2190..a0dc3bf 100755
--- a/ros2nix/ros2nix.py
+++ b/ros2nix/ros2nix.py
@@ -2,7 +2,7 @@
 # PYTHON_ARGCOMPLETE_OK
 
 # Copyright 2019-2024 Ben Wolsieffer <benwolsieffer@gmail.com>
-# Copyright 2024 Michal Sojka <michal.sojka@cvut.cz>
+# Copyright 2024, 2025 Michal Sojka <michal.sojka@cvut.cz>
 
 from os.path import dirname
 import argcomplete, argparse
@@ -105,9 +105,9 @@ def generate_overlay(expressions: dict[str, str], args):
             expr = (
                 expressions[pkg]
                 if args.output_dir is None
-                else f"./{os.path.basename(expressions[pkg])}"
+                else os.path.basename(expressions[pkg])
             )
-            print(f"  {pkg} = final.callPackage {expr} {{}};", file=f)
+            print(f"  {pkg} = final.callPackage ./{expr} {{}};", file=f)
         print("}", file=f)
 
 
diff --git a/test/test.bats b/test/test.bats
index abdf2b3..ad29f08 100644
--- a/test/test.bats
+++ b/test/test.bats
@@ -18,6 +18,12 @@ load common.bash
     nix-build -A rosPackages.humble.ros-node -A rosPackages.jazzy.ros-node -A rosPackages.rolling.ros-node
 }
 
+@test "nixify package in the current directory" {
+    cd ws/src/library
+    ros2nix package.xml
+    nix-build -A rosPackages.jazzy.library
+}
+
 @test "--output-as-nix-pkg-name" {
     ros2nix --output-as-nix-pkg-name $(find ws/src -name package.xml)
     assert [ -f ros-node.nix ]